Portable emergency storage tank



FIG. 1 is a top, front and left side perspective view of a portable emergency storage tank showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a bottom, rear and right side perspective view thereof.

The broken lines in the drawings illustrate the portions of the portable emergency storage tank which form no part of the claimed design. 

CLAIM The ornamental design for a portable emergency storage tank, as shown and described. 